.operator-label {
    display: inline-block;
    background-color: transparent;
    text-decoration: none;
    outline: none;
    cursor: pointer;
    transition: color .3s;
}

.operator-label:hover {
    opacity: 0.6;
}

.operator-label-disabled {
    cursor: not-allowed;

}

.operator-label-disabled:hover {
    opacity: 1;
}

.operator-divider {
    display: inline-block;
    margin: 0 8px;
    width: 1px;
    height: 18px;
    vertical-align: middle;
    background: #d9d9d9;
}
